Harper, P. (1976). Radical technology. New York: Pantheon Books.
Dyfyniad Arddull ChicagoHarper, Peter. Radical Technology. New York: Pantheon Books, 1976.
Dyfyniad MLAHarper, Peter. Radical Technology. New York: Pantheon Books, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.